Montane Icarus Hut SlippersInsulated with innovative PRIMALOFT Black ThermoPlume technology, the synthetic fill that mimics down to provide an incredibly lightweight and warm slipper that performs even when wet or damp Construction PERTEX QUANTUM outer PRIMALOFT Black ThermoPlume insulation Brushed microfleece lining Features Tough Hypalon Sole and side walls Foam sole unit Rear pull loop SIZE CHART Shoe Size XS S M L XL UK 3. 5 5. 5 5. 5 7. 5 7. 5 9. 5 9. 5 11. 5 11. 5 13. 5