Monks of the Way of the Elastic Form have trained their body to stretch and contort far beyond the limits of normal folk. 

By manipulating the elasticity and shape of their body, an elastic monk can augment their unarmed strikes in force, form, and reach. They are also known for being difficult to pin down in a fight. 

Elastic Technique

Starting when you choose this tradition at 3rd level, you can stretch your appendages into deadly weapons. When you use the Attack action with an unarmed strike, you gain the following benefits:

• Bloated Blows: Your Martial Arts die for that unarmed strike is doubled. For example, at 3rd level, the unarmed strike damage would be 2d4; at 5th level, the damage would be 2d6. This does not affect unarmed strikes dealt as a bonus action. 
• Sculpted Strikes: Once per turn, you can change the damage type of all of your unarmed strikes to piercing, slashing, or bludgeoning.
• Elongated Limbs: You can spend 1 ki point to increase the range of your unarmed strikes to a distance of 10 feet. Starting at 8th level, you can spend 1 additional ki point to increase this range to 15 feet. 

Slingshot

At 6th level, if you are within 5 feet of an appropriate anchor point, you can use your action to slingshot yourself in a feasible direction by a distance equal to your Unarmored Movement modifier. You can spend 1 ki point to double this distance. What can be used as an anchor point as well as the direction of slingshot are up to DM discretion.

Rubber Body

At 11th level, you gain the following benefits:

• Shock Absorption: When you take bludgeoning, thunder, or lightning damage, you can use your reaction to gain immunity against that damage type when calculating the damage.
• Extreme Contortion: You can move through spaces occupied by large or smaller creatures without suffering a movement penalty.

Bounce

At 17th level, you are a master of manipulation of your unarmed strikes. The maximum range of your unarmed strikes increases permanently by 5 feet, and when you hit a creature with an unarmed strike, you can spend up to 10 ki points to deliver a rebounding strike. The creature must then make a Strength saving throw. On a failed save, the creature is pushed a distance in feet equal to 5 times the amount of ki points spent. On a successful save, the creature is pushed half that distance.

If the creature is pushed into solid object or surface, it takes force damage equal to your monk level. if the creature is pushed into a second creature, both creatures take force damage equal to half your monk level, and the second creature must succeed on a Strength saving throw or be pushed the remaining distance the first creature would have traveled.