For carpet:

• This computer chair mat stays where you want it without damanging or piercing the carpet backing in your home office
• This thick and sturdy plastic desk mat won't crack or shatter while protecting your office floor from damanging chair casters. OFM provides premium floor protection at an affordable price.
• The textured wear resistant pvc chair mat allows your office chair to move easily without skidding
• This home office floor mat promotes ergonomic posture by allowing you to roll between tasks
• The clear rectangular soft floor chair mat lets the natural beauty of your carpeted floor shine through

For hard floor:· 

• 【Ergonomic Rgonomic Design】Chair mat offers great experience with daily work. It allows you to move your chair easily and helps to considerably reduce the risk of leg fatigue throughout the day.
• 【Scuff Resistant】Chair mats are made from long life polyvinyl chloride. It is scuff resistant so they'll stay looking neat and new.
• 【Anti-Slip】It is designed to use on all hard floor surfaces including tile, hardwood and stone etc. and the underside coated can prevent the mat slipping.
• 【Protect Floor】Protects all hard floor surfaces and remaining odor free and free from volatile toxic compounds to keep a healthy office environment.· 
• 【Easy to Clean】Simply wipe your chair mat down with a soapy dishcloth if there are any spills. No worries about sticking.

Details:

• Material: PVC· 
• Thickness: 2.2 mm· 
• Size:30*48  inches 
• Shape 1 suit for hard floor /Shape 1 No nail
• Shape 2/3 suit for carpet /Shape 2/3 With nail

Warm Tips:·These mats may be rolled when packaged. In such cases, the PVC material may take a few hours to return to its original shape once unpacked.· The mat should be placed smooth side down (facing the floor), textured side up.

Please Follow Below Steps:·

Spread chair mat, begin to roll back from the front direction, put a night, it will naturally flat out.· Put books in each corners and the mat will be flat out after about 8 hours.· Or get some warm water to make it soften, spread it to the opposite direction down.