WARNING: California’s Proposition 65
Fox Racing Tecbase Bib Liner Base Layer Short Adult MTB Body Armor
Base layer bibs with built in chamois
The Tecbase Bib Liner Shorts are designed specifically to pair with all Fox mountain bike shorts and feature lumbar storage for up to two bottles making them an essential piece of kit. Ride long and ride in comfort, care of the triple-density chamois that'll ensure you're not lagging as the day shreds on. These comfortable and breathable liner shorts won't ride up and are with you for the long haul.

| S | M | L | XL | XXL | |
|---|---|---|---|---|---|
| A | Chest | 33-35 | 36-39 | 40-42 | 43-46 | 47-50 |
| B | Sleeve | 32-33 | 33-34 | 34-35 | 35-36 | 36-37 |
| C | Height | 5'6"-5'10" | 5'10"-6' | 6'-6'2" | 6'1"-6'3" | 6'1"-6'3" |
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.

| 28 | 29 | 30 | 31 | 32 | 33 | 34 | 36 | 38 | 40 | |
|---|---|---|---|---|---|---|---|---|---|---|
| S | S | S | S | M | M | L | XL | XXL | XXL | |
| A | Waist | 28-29 | 29-30 | 30-31 | 31-32 | 32-33 | 33-34 | 34-35 | 36-37 | 38-39 | 40-41 |
| B | Hip | 34-35 | 35-36 | 36-37 | 37-38 | 38-39 | 39-40 | 40-41 | 42-43 | 44-45 | 46-47 |
| C | Inseam | 30-301/2 | 30-301/2 | 301/2-31 | 301/2-31 | 31-311/2 | 31-311/2 | 311/2-32 | 32-321/2 | 321/2-33 | 321/2-33 |
| D | Height | 5'6"-5'8" | 5'6"-5'8" | 5'8"-5'10" | 5'8"-5'10" | 5'10"-6' | 5'10"-6 | 6'-6'2" | 6'1"-6'3" | 6'1"-6'3" | 6'1"-6'3" |
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.

| 0 | 1 | 3 | 5 | 7 | 9 | 11 | |
|---|---|---|---|---|---|---|---|
| XS | XS | S | S | M | L | XL | |
| A | Bust | 31 | 33 | 34 | 35 | 36-37 | 38-39 | 39-40 |
| B | Sleeve | 28 | 29 | 29 | 30 | 30-31 | 31-311/2 | 31-311/2 |
| C | Waist | 231/2-241/2 | 241/2-251/2 | 251/2-261/2 | 261/2-271/2 | 28-29 | 291/2-301/2 | 31-32 |
| D | Hip | 34-35 | 35-36 | 36-37 | 37-38 | 38-39 | 391/2-401/2 | 41-42 |
| E | Inseam | 29 | 29 | 291/2 | 291/2 | 30 | 30 | 301/2 |
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.

| 6 (w22) | 7 (w23) | 8 (w24) | 10 (w25) | 12 (w26) | 14 (w27) | 16 (w28) | 18 (w29) | 20 (w30) | |
|---|---|---|---|---|---|---|---|---|---|
| S | S | S | M | M | L | L | XL | XL | |
| A | Chest | 24-25 | 25-26 | 26-27 | 27-28 | 28-29 | 29-30 | 31-32 | 32-33 | 33-34 |
| B | Waist | 22-23 | 23-24 | 24-25 | 25-26 | 26-27 | 27-28 | 28-29 | 29-30 | 30-31 |
| C | Inseam | 20-21 | 21-22 | 22-23 | 23-24 | 241/2-251/2 | 251/2-261/2 | 261/2-27 | 27-271/2 | 271/2-28 |
| D | Height | 46-47 | 48-49 | 51-53 | 54-56 | 57-59 | 60-62 | 63-64 | 65-66 | 66-67 |
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
| 4 | 5 | 6 | 7 | |
|---|---|---|---|---|
| S | M | L | L | |
| Chest | 22-23 | 23-24 | 24-241/2 | 241/2-25 |
| Waist | 21-211/2 | 211/2-22 | 22-221/2 | 221/2-23 |
| Inseam | 17-18 | 18-19 | 19-20 | 20-201/2 |
| Height | 39-41 | 42-44 | 45-46 | 47-48 |
| S | M | L | |
|---|---|---|---|
| Age | 2 | 3 | 4 |

| US | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 |
| EU | 37.5 | 38 | 38.5 | 39 | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 45.5 | 46 | 47.5 |
| UK | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 12 |

| S | M | L | XL | XXL | XXXL | |
|---|---|---|---|---|---|---|
| A | Chest | 33-35 | 36-39 | 40-42 | 43-46 | 47-50 | 51-56 |
| B | Sleeve | 32 - 32 1/2 | 33 - 33 1/2 | 33 1/2 - 34 | 34 1/2 - 35 | 35 1/2 - 36 | 36 |
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.

| 28 | 30 | 32 | 34 | 36 | 38 | 40 | |
|---|---|---|---|---|---|---|---|
| A | Waist | 27-29 | 29-31 | 31-33 | 33-35 | 35-37 | 37-39 | 39-41 |
| B | INSEAM | 30 | 30 - 30 1/2 | 30 1/2 - 31 | 31 - 31 1/2 | 31 1/2 - 32 | 32 - 32 1/2 | 32 - 32 1/2 |
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
With a tape measure, hold it level and measure the circumference at the waist's natural bend.

| 1/2 | 3/4 | 5/6 | 7/8 | 9/10 | 11/12 | 13/14 | |
|---|---|---|---|---|---|---|---|
| A | Waist | 25 | 26 | 27 | 28 1/2 | 30 | 31 1/2 | 33 |
| B | INSEAM | 29 | 29 1/2 | 29 1/2 | 30 | 30 | 30 1/2 | 30 1/2 |
| C | HIP | 35 | 36 | 37 | 38 1/2 | 40 | 41 1/2 | 43 |
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.

| 4 | 5 | 6 (w22) | 8 (w24) | 10 (w26) | 12 (w28) | |
|---|---|---|---|---|---|---|
| A | Waist | 21 | 21 1/2 | 23 | 24 | 26 | 28 |
| B | HEIGHT | 39-41 | 42-44 | 47-48 | 50-52 | 54-56 | 58-60 |
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
* Measure the circumferenceWith tape measure level, measure the widest point of your head, approximately 1" above your eyebrows.
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| 20 7/8 - 21 1/4 | 21 5/8 - 22 | 22 1/5 - 22 7/8 | 23 1/4 - 23 5/8 | 24 - 24 3/8 | 24 5/8 - 25 1/8 | |
| Hat Size | 6 5/8 - 6 3/4 | 6 7/8 - 7 | 7 1/8 - 7 1/4 | 7 3/8 - 7 1/2 | 7 5/8 - 7 3/4 | 7 7/8 - 8 |
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| 20 7/8 - 21 1/4 | 21 1/4 - 22 1/8 | 22 3/8 - 23 1/8 | 23 1/4 - 23 3/4 | 23 1/8 - 24 3/4 | 24 1/8 - 25 3/4 | |
| Hat Size | 6 5/8 - 6 7/8 | 6 7/8 - 7 1/8 | 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 | 7 5/8 - 7 7/8 | 7 7/8 - 8 1/4 |
| YS | YM | YL | L | |
|---|---|---|---|---|
| 18 1/2 - 18 7/8 | 19 1/4 - 19 3/4 | 20 - 20 1/2 | ||
| Hat Size | 5 7/8 - 6 | 6 1/8 - 6 1/4 | 6 3/8 - 6 1/2 |
| S | M | L | XL |
|---|---|---|---|
| 21 1/4 - 22 1/8 | 22 3/8 - 23 1/8 | 23 1/4 - 23 3/4 | 23 7/8 - 24 3/4 |

| S | M | L |
|---|---|---|
| 6 - 8 | 8 - 10 | 10 - 13 |
* Use your regular shoe size as a reference for all sock sizing.
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
|---|---|---|---|---|---|---|---|---|
| Measure | 9.9375 | 10.25 | 10.5625 | 10.9375 | 11.25 | 11.5625 | 11.875 | 12.1875 |
Use your regular shoe size as a reference. Boots are in Men's or Boy's sizes. If you are following the measurements, use a regular ruler. Make sure you are standing, wearing the socks you will wear with your new shoes or boots. Then convert the measurement to your shoe size using the above chart. Measurements are a guidline and do not guarantee the proper fit. Note, Fox boots are only offered in whole shoe sizes, so take this into consideration when using the measurement chart.
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | |
|---|---|---|---|---|---|---|---|
| Measure | 9.9375 | 10.25 | 10.5625 | 10.9375 | 11.25 | 11.5625 | 11.875 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 | |
|---|---|---|---|---|---|---|---|
| Measure | 8.5 | 8.875 | 9.25 | 9.5 | 9.875 | 10.1875 | 10.5 |
| Y1 | Y2 | Y3 | Y4 | Y5 | Y6 | Y7 | Y8 | |
|---|---|---|---|---|---|---|---|---|
| Measure | 7.75 | 8.125 | 8.5 | 8.75 | 9.125 | 9.5 | 9.75 | 9.9375 |
| k10 | k11 | k12 | k13 | |
|---|---|---|---|---|
| Measure | 6.5 | 6.75 | 7.125 | 7.5 |

* Measure hand circumference without thumb| S (8) | M (9) | L (10) | XL (11) | XXL (12) | XXXL (13) | XXXXL (14) |
|---|---|---|---|---|---|---|
| 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 | 7 5/8 - 7 7/8 | 7 7/8 - 8 1/8 | 8 1/8 - 8 3/8 | 8 3/8 - 8 5/8 | 8 5/8 - 8 7/8 |
| S (8) | M (9) | L (10) | XL (11) |
|---|---|---|---|
| 6 5/8 - 6 7/8 | 6 7/8 - 7 1/8 | 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 |
Hand measure should be taken from the wrist to the end of the middle finger. If right-handed be sure to use right hand.

| S | M | L | XL | XXL | XXXL | |
|---|---|---|---|---|---|---|
| A | Chest | 34-35 | 36-38 | 40-42 | 44-46 | 48-50 | 52-54 |
| B | Sleeve | 31 1/2 - 32 1/2 | 32 1/2 - 33 1/2 | 33 1/2 - 34 1/2 | 34 1/2 - 35 1/2 | 35 1/2 - 36 1/2 | 35 1/2 - 36 1/2 |
| C | Waist | 28-30 | 31-33 | 34-36 | 38-40 | 42-44 | 46-48 |
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.
With a tape measure, hold it level and measure the circumference at the waist's natural bend.

| Small/Medium | Large/X-Large | |
|---|---|---|
| A | 11" / 28cm | 13" / 30cm |
| B | 8.5" / 22cm | 9" / 23cm |
| C | N/A | N/A |
Above Elbow CenterBelow Elbow Center
| Small/Medium | Large/X-Large | |
|---|---|---|
| A | 15-16" / 39-41cm | 17-18" / 43-46cm |
| B | 12.5"-13" / 32cm-33cm | 14"-15" / 36-38cm |
| C | N/A | N/A |
Above Knee CenterBelow Knee CenterWith tape measure level, measure the widest point of your head, approximately 1" above your eyebrows.
| X-Small | Small | Medium | Large | X-Large | XX-Large | |
|---|---|---|---|---|---|---|
| 20 7/8 - 21 1/4 | 21 1/4 - 22 1/8 | 22 3/8 - 23 1/8 | 23 1/4 - 23 3/4 | 23 1/8 - 24 3/4 | 24 1/8 - 25 3/4 | |
| Hat Size | 6 5/8 - 6 7/8 | 6 7/8 - 7 1/8 | 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 | 7 5/8 - 7 7/8 | 7 7/8 - 8 1/4 |
* Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
New or Brand New - Brand new item in original packaging (original manufacturer's warranty may apply).
Refurbished - Professionally restored and in perfect working condition. Original packaging may be missing or slightly damaged.
Used - Item has seen limited use but remains in good working condition. May show some limited signs of wear with small scratches or cosmetic blemishes. May arrive with damaged packaging or be repackaged.
Refurbished, Without Tags - Same as refurbished. Item may arrive with mising labels or tags.
Refurbished, Last Call - Same as refurbished. Last call or closeout item.
| Product Image | Color | Size | SKU | Availability | Price |
|---|---|---|---|---|---|
| Black | Small | 31184-001-S | In Stock | $109.95 | |
| Black | Medium | 31184-001-M | In Stock | $109.95 | |
| Black | Large | 31184-001-L | In Stock | $109.95 | |
| Black | X-Large | 31184-001-XL | In Stock | $109.95 |