Our 3000x2500mm HDPE mposite Swamp Mats/HDPE mposite mat Bog Mats, hdpe temporary road matting bog mats/hdpe mposite swamp mat is best for. Access Roads. Lease Sites. Drilling Pads. Pipeline nstruction. Sensitive Environmental Areas. Special Features (1) All mats are available in 12’, 14’, and 16’ in length.