Bootcap 2.0 Black From Broken to Restored YouTube. Bootcap 2. 0 Black Stay warmer. Ski longer. Made of high density foam, bootcap keeps skiers feet 20 F warmer without batteries or other electronics. The brainchild of ski industry veterans, bootcap adheres directly to the outside of a ski boots toe box, providing instant insulation and warmth. A solution so simple, we were surprised it hadnt been invented already! How It Works Optimized Fit With a tapered bottom edge, bootcap stays attached during rigorous bootpacks. This optimized shape provides an integrated fit. 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.