Skier in deep powder, black and white

How it Works

The Science Behind

Freezer test chart: ski boot temperature over one hour, with and without °bootcap®

Test #1

The Freezer

We took a pair of ski boots, fitted one boot with °bootcap® and left the other “naked”. Digital thermometers were taped inside the liner of each ski boot in the toe area, then we stuffed identical towels into the top of each boot to simulate a skier’s lower leg. Without any type of heat source added to the boots, the initial measurements read 22 °C (71 °F, room temperature). Then we placed both boots in a −26 °C (−15 °F) freezer and took temperature readings every five minutes for one hour. As expected, the temperature of both boots dropped, but the boot equipped with °bootcap® stayed an average of 8 °C (15 °F) warmer.

Field ski test chart: boot temperature over five hours, with and without °bootcap®

Test #2

The Field

Again, we conducted a side-by-side test of two boots; one fitted with °bootcap® and the other left “naked”. With digital thermometers taped inside the liner of each ski boot in the toe area, this five-hour test started inside a car at 20 °C (68 °F). Outside, the temperature was −1 °C (30 °F), with a wind chill of −10 °C (14 °F). After stepping out of the car and onto the slopes, the temperature of the °bootcap® equipped boot stayed around 19–20 °C (high 60s °F) for the first 2.5 hours while the “naked” boot’s temp quickly fell, eventually leveling off around 7 °C (mid 40s °F). After 5 hours, the °bootcap® boot was in the mid 50° range and the “naked” boot dropped to around 5 °C (low 40s °F). The resulting data showed an average temperature gradient of about 5.5 °C (10 °F) over the entire day proving that °bootcap® will keep skiers’ feet warmer for longer.

An Even Better Heading

A redesigned °bootcap® for an even better experience. In addition to 5 new color options, all °bootcaps® feature an improved design that is better fitting, easier to install, and more resilient.

Optimized Fit

With a tapered bottom edge, °bootcap® stays attached during rigorous bootpacks. This optimized shape provides an integrated fit for any ski boot.

Easy Installation

The adhesive strips prevent overlap and buckling, while the strong paper backing prevents premature tearing when being removed.

Durable Construction

The strong and dense bottom EVA foam layer provides maximum adherence to your ski boot, while the softer, flexible top layer enhances bonding to reduce delamination.

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