These items are tailor made to comply with drawings and/or customer requirements, designed to give close fit by specialists with years of experience.

They are typically constructed with an insulating filler, such as glass, silica, mineral wool or closed cell foam; protected by coated fabric or stainless steel mesh and foils, the choice of the outer cover material depending upon the application, i.e. UV, radiant heat, chemical attack, molten metal splash or just oil and water resistance.

Some fabrics are available in different colours for colour coding of hot water, chill water, steam, etc.

Seams are sewn with high temperature threads, usually with Kevlar TM, PTFE coated glass fibre or stainless steel thread to suit application.

Removable flexible jackets are secured with hooks and back plates (brass, nickel or stainless steel), or velcro hook and loop strip. They are designed for easy removal by one person, and can be re-used.

Beside thermal insulation, other functions of insulation pads and jackets can be:

fire protection: reduce the risk of fire damage by use of fire resistant materials.

noise insulation: reduction in noise levels when used as pump covers, exhausts, etc.

vibration absorption: flexibility of materials reduces damage to covers caused by vibration.

freeze protection:  can also be used outdoors and can be supplied with heating elements.