The scope of this document is limited to the suit and not all other IPE elements. Though the concepts described within this document should also be applied to other elements of IPE. PURPOSE The purpose of this Allied Engineering Publication (AEP) is to assist in the development@ setting requirements@ evaluation and acquisition of a Low Burden Suit (LBS). AEP 85 should be used in conjunction with AEP 38 (which describes general requirements for CBRN suits) alongside the other documents listed below if a nation wishes to develop a LBS. a. AJP-3.8 (A) (STANAG 2451) - Allied Joint Doctrine for CBRN Defence. b. ATP-3.8.1 Vol 1 (STANAG 2521) - CBRN Defence on Operations. c. ATP-3.8.1 Vol 2 (STANAG 2522) ?C Specialist CBRN Defence Capabilities. d. AEP-38 (STANREC 4548) - Operational Requirements@ Technical Specifications and Evaluation Criteria for CBRN Protective Clothing. e. AEP-72 (STANREC 4726) - Recommended CBRN and Toxic Industrial Chemical (TIC) Challenge Levels. f. ATP-65 (STANAG 2499) - The Effect of Wearing Individual Protective Equipment (IPE) on Individual and Unit Performance during Military Operations. g. ATP-84 (8) (STANAG 2352) - CBRN Defence Equipment Operational Guidelines. h. AEP-58 (STANAG 4653) ?C Combined Operational Characteristics@ Technical Specifications@ Test Procedures and Evaluation Criteria for CBRN Decontamination Equipment. i. AEP-52 (STANAG 4625) Assessment of Effect Levels of Classical Chemical Warfare Agents Applied to the Skin to be Used in the Design of Protective Equipment. j. AEP-73 (STANREC 4727) Combined Operational Characteristics@ Technical Specifications@ and Evaluation@ Tests and Criteria for Protective Masks. 1 Physiological burden is used in this document to describe the adverse effect a clothing system may impart on the wearer. These factors may be either direct or indirect in their impact and will include (but are not limited to): thermal resistance@ evaporative resistance@ drape@ bulk@ mass@ stiffness@ design@ mobility etc.