Triangular Bandage or a sling is versatile for arm,neck, shoulder, wrist injuries

• Lightweight
• Easy to use
• Affordable
• Multiple ways of tying to support
• Can be used to cover non-arm injuries such as head or open wounds
• Available in first aid kits

Cons 

• Movable arm due to light fabric eg run, it will be tricky to remain immovable, and hands are full because other arm supports it
• Bleeding wounds may seem through sling due to thin fabric
• Ties may be sustainable for short period, not long

Arm sling is an object that helps to carry a broken arm. Some are made of fabric make sure it is will remain immovable.

Pros:

• customized designed to prevent shoulder and elbow joints from moving, reduces pain
• durable – able to withstand,wear, pressure ( not able to tear fabric)
• immovable – comforting for arm/elbow injury
• soft fabric  – polycotton material, breathable
• easy to wash with mild soap and water
• Shoulder pad has a padding so that it is comfortable to wear it for long period
• Able to change elevation of upper strap (neck) – higher or lower

Improvements

• fabric over neck supported with cushion so that after long period of wear, it would not strain the neck muscles
• In context of being in military, it needs an outer layer that blends in well with uniform – blend in with surroundings / attack for injured
• when lying down, use folded pillow under elbow
• To take strain off neck, use a pillow(s) below elbow so strap over next is loosened