Here's what other sites are saying:
Keep him warm when he's kicking around base camp with Sierra Designs' Down Booties. These insulated, indoor / outdoor boots keep his toes warm and dry in the tent or at home with 700-fill-power goose down insulation and DWR-finished nylon fabric.
- Mountain Gear refers to the boys' version
The classic original, the Sierra Designs Down Bootie for Boy's is a tried, true cold-weather companion. Built with 650 goose down insulation, these Down Booties keep your toes toasty warm, around the house and in the backcountry. A feather-proof nylon shell exterior is coated with DWR to shed moisture and is reinforced with silicon for enhanced durability. An internal EVA footbed and external non-slip sole help you stay comfortable and keep your footing on hardwood floors and other slippery terrain.
- Altrec Outlet refers to the boys' version