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1. Ergonomy:- It should be possible to wear, adjust and remove the helmet with ease even with gloved hands. It should be provided with a three point chin strap with comfortable cushioned chin cup made of appropriate non-abrasive, non-allergic material/double strap of reasonable width. The helmet should adequately cover the neck and ears but it should not impair the hearing. Helmet should be compatible with active ear protection. 2. Shape:- The helmet should adequately cover the head, neck and ears of the wearer and its design should be on the lines of Advanced Combat Helmets (ACH). The shape of the helmet should facilitate the use of handsets within service communication equipment. Helmet should have provision to mount a display system, hands free communication equipment and fix-electrooptical devices and detachable visor as and when required. 3. Material:- Vendor should declare the type of material, number of layers, construction, dimension and weight during tendering process. 4. Surface Finish & Colour:- The proposed helmet should be of crinkle matt finish and able to be provided in any of the following colours: - (a) Khakhi/Sand/Desert Tan (b) Olive Green (c) Black (d) White (e) Or any other colour specified by the user. 5. Protection:- Protection of helmet against .44 mag and 9x19mm cartridge fired through Sub Machine Gun (Such as Sten Machine, MP-5, Carbine any other variant) from a distance of 5 meters to achieve a muzzle velocity 430 ± 15m/s and weight of the bullet between 7.4 gram to 8.2 gram. The material of the helmet should be fire/flame retardant and water resistant.

6. Climatic Condition:- The entire helmet must withstand repeated and sustained exposure to climatic conditions as given below: - (a) Temperature – -50°C to + 60°C for six hours (b) Relative Humidity – up to + 90% 7. Use of Optical Instruments:- The design of the helmet should be such that it should not obstruct the use of monocular/binoculars (day and night), optical sights fitted on the weapons, range finders and Artillery optical instruments as per the requirement of user. 8. Compatibility:- The design of the helmet should be compatible to wear along with respirators and chemical hoods. The metal/plastic parts if used must be coated and laminated with grade-I insulation. 9. Comfort:- The helmet should not cause any undue discomfort even after prolonged wearing by an individual for more than eight hours. The helmet should not hinder aiming during firing and enable unhindered use of in service optical devices and personal spectacles. 10. Weight:- The weight of the helmet less the visor should be as under:- (a) Small Size Helmet – Not more than 1.3 kg (b) Medium size helmet – Not more than 1.4 kg (c) Large size helmet – Not more than 1.5 kg 11. Inner Lining/Harness:- The helmet should be provided with a suspension system which should be adjustable to head size. A removable pad system for suspension, comfort and protection from the deformation as mentioned in the para-5 above should be provided, which should ensure air circulation. 12. Chin Strap:- Adjustable chin strap with three or four points support must be provided. The material of the chin strap should be suitable to Indian weather conditions and should be rugged enough to withstand rough handling in the field. The buckle of the chin strap should be easy to engage/disengage and its position on the cheek should not hinder aiming during firing. The material of the buckle should be harmless to skin in all types of climate conditions. 13. Size:- The helmet should be provided in three sizes, viz. Small, Medium and Large size. The circumference of the helmet should be adjustable as under: -

(a) Small Size – 48 up to 52 cms (b) Medium Size – more than 52 up to 57 cms (c) Large Size – more than 57 up to 64 cms 14. Shelf Life:- Shelf life of helmet indicated is 10 years in storage conditions. The operational life of 7 years is mentioned in field conditions, because of different climatic conditions and normal wear and tear. In this regard manufacturer has to submit a certificate along with the supply. 15. Provision for Visor:- Suitable provisions should exist in the Bullet Proof Helmet for attaching a protective visor. An additional weight of upto 1.5 kgs with click system (Tolerance of 10 gms permitted) for the visor along with provision for its attachment in the overall weight of the helmet is acceptable. The visor and provision for its attachment in the helmet would be required on selective basis as per user requirement. It should provide protection against ballistic fragments and other flying debris. It should have a clear air passage on the top and bottom to prevent fogging of the visor. It should confirm to confirm to ballistic protection as per the user requirement. 16. Packing:- The helmet should be packed individually in a water proof carry bag. 17. Warranty: - Store supplied against this specification shall be deemed to bear the warranty of the supplier against defective design material, workmanship and performance for period of twelve months from the date of receipt of store at consignee end. And if during the specified period, the store supplied is found to be defective, the same shall be replaced immediately with serviceable store by the supplier at site free of any charges as may be decided by the purchasing officer, on recommendation of consignee/Quality Assurance Authority

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Helmet SizeNo