KNOW YOUR TECH breaks down the scientific technology used in your favorite sneakers and activewear. Let’s demystify your next purchase: today’s technology is DownTek. This water-repellent material mimics the warming capabilities of down while eliminating some of the negative connotations often associated with the filling.

What is it? An ultra-fine hydrophobic polymer which is applied to down fabric. This repellant coating allows down to remain dry in the wettest of conditions.

How does it work? With normal down, it takes a long time to dry out after becoming wet, rendering the material useless while you wait. With DownTek, the filling's ability to insulate is unaffected by wetness, maintaining a warm and breathable feel.

Notable products: LL Bean Ultralight Down Jacket, LL Bean Sleeping Bag, Big Agnes Bellyache Mountain SL

Bottom line: Whether you're camping in unpredictable weather or making treks in torrential downpours, DownTek has got you covered.

KNOW YOUR TECH: Nike Hyperfuse