Spin Ultra - Womens Size:40.5 down filled booties are designed

down filled booties are designed for bivi or in-tent use

It's got plenty of comfortable stretch plus chlorine and sun resistance too

This year-round performer features their lightest-weight Merino jersey fabric with a nylon core to increase durability while still keeping 100% soft Merino wool next to skin

Made with a 100% recycled Pertex® Quantum outer

Crater and Expanse knives with bit drivers)

Spin Ultra - Womens Size:40.5 down filled booties are designedThe perfect choice for moderate to ultra distance runs, the multi award winning Spin Ultra offers outstanding cushioning and support in a stable package featuring ample upper protection to keep your feet feeling great in all types of terrain.