Closed-cell foam.
Look in Walmart's Notions dept. They have eyeglass repair kits that have these.
There are three main types of nose pads for glasses: silicone, foam, and PVC. Silicone nose pads are soft and flexible, foam nose pads are cushioned for comfort, and PVC nose pads are durable and long-lasting. Each type offers different levels of comfort and support for the wearer.
Some people use rubber eyeglass grips, silicone nose pads, or adjustable temple tips to prevent eyeglasses from slipping. These methods help provide a snug and secure fit for the glasses, reducing the chances of them sliding down the nose.
What are eyeglasses? They are lenses, either concave or convex, within a frame and they are worn on your face upon your nose if you have unclear vision.
Stri-dex pads
No, the pad-to-frame has a different interface, though, the Straight Jacket nose pads will fit with the Scalpel frame.
Pads that are made of cotton
Cricket pads are made out of willow wood.
The are called Eyebobs.
The only difference are the nose pads. The nose pads installed are thicker so they sit higher on Asian faces. If the wearer doesn't have the prominent nose bridge, the frame will be resting on the cheeks and not on the nose. Everything else is the same with regular fit Jawbones.
Glasses with soft nose pads provide added comfort and durability. The soft material reduces pressure on the nose, making them more comfortable to wear for extended periods. Additionally, the soft pads are less likely to break or cause irritation compared to harder materials, increasing the longevity of the glasses.
At DabbleDoos.com they are referred to as "peepers keepers", eyeglass necklaces or eyeglass leashes.