Got this for ski trip, but we end up never going. There is slight discoloration / (dirty?) on the back (see pics). It came light

Very fine LEGO Wear skipants made of a highly flexible quality that enables your child to move freely. The skipant has many functions, which make them perfectly suited for any kind of skiing.
The skipants are 100% windproof + breathable, made of a durable 10,000mm water column material. Bionic Finish ECO on the surface. All seams are fully-specially taped for 100% waterproofing.
Extra durable Cordura reinforcement at bottom legs & inseams. Insulated padding keeps your child warm. Adjustable/ removable suspenders and belt loops. Snap button and YKK zipper closure at waist.
Wind placket under/over zipper. Reflective zipper pockets in front. Snow skirt inside bottom legs with rubber gripper. YKK zipper & snap button at bottom leg sides. Elastic waist sides for good fit.

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