They are B&M only though, so no way to check if your Costco has them except calling.
Here are the Non-Polarized on Amazon: Link
Lightweight, yet stable, the Nike® Tailwind 12 Max Speed Tint Lens Running Sunglasses simply outperforms the competition.
Enhanced clarity and protection with Max Speed Tint.
Lightweight nylon frame improves comfort, flexibility, and durability.
Nike Max Optics provide clarity at all viewing angles.
Ventilated nose bridge improves fit and comfort while reducing fogging.
Secure-wrap temples improves stability and comfort.
8-base frame design optimizes coverage.
Cam-action hinges snap firmly into place.
Interchange pouch included.