Sierra is an outdoor and active-lifestyle retailer offering apparel, footwear, gear, and accessories for women, men, and children. Its selection spans everyday and performance clothing, including activewear, base layers, shorts, jackets, and swimwear, alongside shoes and boots for activities such as hiking, running, and cross-training. Shoppers can also find equipment and accessories for camping, fishing, cycling, golf, and other outdoor pursuits, as well as backpacks, hydration packs, and selected home décor.

The site features new arrivals and clearance items, with products from brands such as Quiksilver, Timber Ridge, Pajar, and Milwaukee Boot Company. Examples include waterproof and insulated ski clothing, snow boots, running shoes, and hydration packs. Sierra promotes savings against comparable regular prices at department or specialty retailers, noting that styles and availability may vary between stores and online. Shopping options and services highlighted include store locations, order pickup, ship-to-store, and easy returns. The site also references TJX Rewards, gift cards, and the TJX family of brands.