Smartwool Women's PhD Run Ultra Light Micro Sock Trail Running Shoes you can use the clip

you can use the clip to attach it to backpacks

Stands on its own even when pre-filled

Energy/Kcal: 369Kcal

Detachable waist strap

Biggest carry-on allowed by most airlines

Smartwool Women's PhD Run Ultra Light Micro Sock Trail Running Shoes you can use the clipDescription Smartwool PhD Run Ultra Light Micro Sock is great for mild weather and shorter distances without the tan line. 4 Degree Elite Fit System uses 2 elastics for greater stretch and recovery to keep the sock in place. High impact areas provides the longer lasting protection to keep feet comfortable. Low profile and durable virtually seamless toe with alternating 1 x 1 welt. It is available in a black colour. 1. 5 inch Sock overall height. Ultra