【EXPANDABLE SOFT-SIDE CARRIER】The M size of carries is 17"Lx 11"Wx 11"H and expandable size is 20"Lx17"Wx11"H by expanding the 1 mesh windows. This carrier is with light weight of around 2.5lbs and fits pet up to 13lbs.Please base on the measured size,the weight suggesion is only for reference.

【COMFORTABLE SPACE】Extra extended space enable pets sprawl out, lay, see all around and relax when you have a flight trip, also works great in the car, roomy and they lay in it like a bed. Carrier can be folded totally flat when not in use

【DURABLE MATERIAL】Solid wire structure keeps it from collapsing, flexible enough to compress to fit under an airplane seat. Top & 2-sided windows that are made of anti-scratch ventilated mesh. Actual PP board base helps to hold all pets steady, with thick comfy washable & removable plush pad as base cover. Well stitched oxford cloth material ensures long-term use

【MULTIPLE WAYS TO CARRY 】Self-lock zipper to prevent your pets from escaping. A strap on one side can be slid around the extendable handle of rolling luggage. Two flexible handles to hold with your hands. Additionally, it provides a longer, detachable strap to hang on the shoulders and has a side pocket for storage

【AIRLINE APPROVED CARRIER 】This carrier of S & M size is airlines approved, in compliance with airline standard size rules. Easily to get this under the airplane seat when travel. As for the size of L, it is best to check the size standard of the corresponding airline(PS:There are two detachable fiber rods on both sides of the top of the carrier. When the large carrier is too high to fit under the seat, you can remove the two fiber optic rods and put them in easily)