Rapide SL Pillow Arc'teryx Smoothed out toe seams for Smoothed out toe seams for ultimate in shoe fit and comfort Has a mid back keeper strap that helps secure it to the pack and keep the sides from catching wind (except size XS) Ultralight pillow for sweet dreams on the trail Minimalist offset I Beam construction reduces weight and provides consistent stability and comfort Ergonomic thickness and shape for comfortable sleep position Built in advanced heat reflective technology Antimicrobial treatment inside the pillow prevents microorganism growth Four way stretch nylon's soft touch provides a comfortable place to lie your head where ever your adventure takes you Fits in pillow barn of Big Agnes sleeping bags Stuff sack included single port