Silca Endurance Chip Wax Additives
Size Guide
- Women
- Men
- Teen
- Kids
- Footwear
- Dog Pajamas

| Women | ||||||
| Chest | Waist | Hip | ||||
|---|---|---|---|---|---|---|
| XS 0-2 |
32-34 | 26-28 | 35-37 | |||
| S 4-6 |
34-36 | 28-30 | 37-39 | |||
| M 8-10 |
36-38 | 30-32 | 39-41 | |||
| L 12-14 |
39-42 | 33-35 | 42-44 | |||
| XL 16-18 |
43-45 | 36-38 | 44-46 | |||
| XXL 18-20 |
46-48 | 39-41 | 47-49 | |||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Hip: Measure around the fullest part of hips while standing straight with heels together. *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Men | ||||||
| Chest | Waist | Neck | ||||
|---|---|---|---|---|---|---|
| S 36/38 |
36-38 | 28-30 | 14-14.5 | |||
| M 38/40 |
38-40 | 32-34 | 15-15.5 | |||
| L 40/42 |
42-44 | 36-38 | 16-16.5 | |||
| XL 46/48 |
46-48 | 40-42 | 17-17.5 | |||
| XXL 50/52 |
50-52 | 44-46 | 18-18.5 | |||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Neck: Measure around the neck allowing the measuring tape to lay on the neck base comfortably. *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Teen | ||||||
| Chest | Waist | Hip | Height | |||
|---|---|---|---|---|---|---|
| XS 7/8 |
26-28 | 22-24 | 27-29 | 52-54 | ||
| S 9/10 |
28-30 | 24-25 | 29-30 | 55-56 | ||
| M 11/12 |
30-31 | 25-26 | 30-32 | 57-59 | ||
| L 13/14 |
31-32 | 26-28 | 32-34 | 60-62 | ||
| XL 15/16 |
32-33 | 28-30 | 34-36 | 62-63 | ||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Hip: Measure around the fullest part of hips while standing straight with heels together. Height: Measure from the top of the head and pull the tape straight down to the floor. Stand straight with both feet together (bare feet only). *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Kids | |||||||||||
| Chest | Waist | Hip | Inseam | Height | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2T | 20-20.5 | 20-20.5 | 20-21 | 14-15 | 33-35 | ||||||
| 3T | 20.5-21 | 20.5-21 | 21-22 | 15-16 | 35-38 | ||||||
| 4T | 21-22 | 21.5-22 | 22-23 | 16-17 | 38-41 | ||||||
| 5/6 | 22-24 | 22-23 | 23-25 | 17-20 | 41-49 | ||||||
| 7/8 | 24-26 | 23-25 | 25-28.5 | 20-24 | 49-55 | ||||||
| 10/12 | 26-30 | 25-27 | 28.5-32 | 24-28 | 55-60 | ||||||
| 14/16 | 30-33 | 27-30 | 32-36 | 28-30 | 60-63 | ||||||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Hip: Measure around the fullest part of hips while standing straight with heels together. Height: Measure from the top of the head and pull the tape straight down to the floor. Stand straight with both feet together (bare feet only). *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Footwear | ||||||
| Women's | XS 5.5-6 |
S 7-8 |
M 9-10 |
L 10.5-11 |
XL 12-12.5 |
- |
|---|---|---|---|---|---|---|
| Men's | XS 4.5-5 |
S 6-7 |
M 8-9 |
L 9.5-10 |
XL 11-11.5 |
XXL 12.0-12.5 |

| Dog Pajamas | ||||||
| XS 8-12 |
Fits Toy Poodle, Chihuahua, Yorkshire Terrier | |||||
|---|---|---|---|---|---|---|
| S 12-16 |
Fits Jack Russell Terrier, Pug | |||||
| M 16-20 |
Fits Beagle, Dachsund | |||||
| L 20-24 |
Fits Schnauzer, Cocker Spaniel | |||||
| XL 24-28 |
Fits Pit Bull, Labrador and Golden Retrievers, German Shepherd | |||||
| How to Measure
Length: Measure your pet from the base of its neck to the base of its tail. Bump up a size if your pet has a thick coat, broad chest, or broad underside. *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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EnduranceChip is a semi-synthetic wax blend boasting some of the longest molecular chain lengths possible in a wax for ultimate durability. Adding EnduranceChip to SecretBlend can permanent increase the distance between re-waxing by as much as 2.5X (up to 750km) while still being as fast as the top wet lubricants and significantly faster than any dry lubricant.
One of the secrets behind Secret Chain Blend is that it's a mix of 4 unique types of wax and not just Paraffin like most other hot wax products. This blend of waxes along with our proprietary WS2 has kept the Secret Chain Blend on top of the ZeroFrictionCycling charts for the last 3 years with many competitors reformulating to get close, but none of them able to beat it.
The 4 wax mix has allowed SILCA to blend what we felt was the best overall mix of high performance, dirt resistance, and application longevity, but over the years as we've worked with professional gravel athletes, WorldTour teams, Olympic medalists and more, the request has come up over and over again to custom formulate waxes for specific events or situations. Rather than make an endless number of custom blends, early in 2024 we started shipping two different wax additive kits to our athletes and teams for testing new formulations based on their events and experiences.
The challenge in formulating waxes is that the fastest, most exotic waxes, tend not to last as long per application, while the most durable, longest lasting waxes tend not to be as fast. Rather than blending new and custom formulations for each event, we gave the power to formulate to the athletes, and the results they came back to us with have been incredible with more than 100 victories in WorldTour, Lifetime Grand Prix, the Olympics and many more!
This new system puts the optimization process in the hands of the athlete. Want a training wax that lasts 600km between waxings, you've got it. Want a race wax that's won multiple Tour de France stages, you've got it. Want the most insane TT wax for your 40km TT, you've got it.
Internally we started out calling the process 'Wax Doping' but with so much exposure to world class athletes we've decided to call the process 'Wax Optimization'. Introducing, SpeedChip and EnduranceChip, wax optimization agents that allow you to blend the perfect wax for your needs.
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