D3O is a rate-sensitive smart material that remains soft and flexible during normal movement but instantly stiffens upon impact to absorb energy. This allows park skiers to have unrestricted mobility for tricks while still getting hard-shell-like protection on big falls.
Ski Knee Pads · Freestyle/Park Knee Pads
What is D3O and why is it good for park knee pads?
Related gear types
If this answer nudged you toward a different style, these guides compare specs and trade-offs.
Hard Shell Impact Knee Pads
$40 – $150
Rigid-shell knee pads delivering maximum impact protection for aggressive skiing.
rigid plastic or composite outer shellthick EVA or similar foam backingadjustable straps or sleeve design
Soft Shell Impact Knee Pads
$30 – $100
Flexible knee pads using smart foam materials for comfortable impact protection.
smart foam padding (D3O, Poron XRD, SAS-TEC)flexible and low-profile designslip-on or strap closure
Low-Profile/Stealth Knee Pads
$35 – $100
Ultra-thin knee pads designed to be worn invisibly under ski pants for everyday protection.
ultra-thin smart foam paddingsleeve or compression short integrationminimal bulk
More questions
- Do I need hard shell knee pads for the terrain park?
- Why are slip-on sleeves more popular than straps for park pads?
- How do I keep my park knee pads from sliding down?
- Can I wear freestyle knee pads over my ski pants?