XtraLife binders survive rough conditions with endurance features; tough 1" binder has cold-resistant covers guaranteed not to crack, firm locking Slant-D rings and sturdy tear-resistant hinges Ultra-durable XtraLife binder covers withstand extreme cold exposure to -40° for up to 3 years, guaranteed*; ideal for contractors, real estate agents or outdoor workers in the car or at the job site ClearVue covers let you swap out inserts on all 3 sides for binder projects that look their best; an affordable upgrade for school supplies, office supplies or home use for recipe binders and more Strong 1" Locking rings with GelTab triggers hold pages tight and open easy; Slant-D rings store 25% more than round rings—up to 270 sheets of paper; 2 interior pockets store loose sheets Binders are PVC-free and non-stick so your white covers remain ink and toner-free for the life of your binder; each notebook is archival safe for papers and photos