Herdmate — Sleep Collection
Athabasca
Sleep Sack
Dressing Guide
Inspired by the Athabasca Glacier, the Athabasca Sleep Sack reflects Herdmate's commitment to thoughtful materials and conscious design. Crafted using rare natural fibres.
70% Baby Cashmere · 30% Mulberry Silk
70% Royal Alpaca · 30% Mulberry Silk
Why Athabasca Sleep Sack Works Across Seasons
What to Wear Under Your Athabasca Sleep Sack
Adapts to Temperature
Enhances Airflow
Manages Moisture
Reduces Overheating
16–18°C
61–64°F
Cool Room
Long sleeve bodysuit + footed pajamas
or
Herdmate Pima Cotton Zip Romper
18–21°C
64–70°F
Ideal Nursery
Long sleeve bodysuit + lightweight pajamas
or
Herdmate Pima Cotton Zip Romper
21–24°C
70–75°F
Comfortable
Long sleeve bodysuit
or
Short sleeve bodysuit
Helpful Tip
Check your baby's temperature by gently feeling the back of the neck or chest. Hands and feet may feel cool even when your baby is comfortable.
If your baby feels sweaty or hot, remove a layer.
A Herdmate Difference
Most sleep sacks rely on synthetic insulation and require multiple TOG ratings for different seasons. The Athabasca Sleep Sack, made with cashmere or alpaca blended with silk, naturally adapts to changing temperatures — so one sleep sack can work comfortably across seasons.