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Get started with CJ Socket, including order forms, registration for our half-day certification course, and other helpful materials.


As a professional, our goal is to ensure that you have the knowledge and resources to provide the highest level of care for your patients and improve their quality of life.


Our team is dedicated to providing ongoing support, so if you have any questions or need additional resources, please don't hesitate to reach out. We're here to help you succeed!

Certification training

  • Course Agenda - Please note, CEUs are approved for both ABC and BOC for this half-day course.



CJ Socket-certified prosthetists can place orders directly with the factory.  Visit our ordering page for more information. 


As a patient, you deserve the best in prosthetic care. That's why we've created this Patient Resources section, to provide you with all the information and support you need to get the most out of your ActivFIT Socket.

Here, you'll find a range of resources, including instructional videos to help you get the most out of your socket.

We understand that the journey of living with a prosthetic can be challenging, but we're here to support you every step of the way. Our goal is to help you achieve greater comfort, mobility, and independence with your ActivFIT Socket.

  • How do I place an ActivFIT CJ Sail order with the factory?
    CJ Socket-certified prosthetists can order ActivFIT CJ Sail from the factory. Email completed order form to: or text picture of completed order form to Toni's cell phone: (845) 987-9271. Don’t have a lab or not CJ Socket Certified? Contact us about C-Fab or scroll up to download an order form from one of our CJ Certified Central Fabricators for your entire socket.​
  • How do I become a CJ Socket-certified prosthetist?
    You need to attend our Introduction to CJ Socket course. This course is a half-day of instruction including a patient fitting. Please contact us via phone (978-922-0413) or email us to schedule.
  • How long will it take to get my ActivFIT CJ Sail?
    Orders are confirmed via phone, email, or text upon receipt. Standard manufacturing to shipping time is 24 business hours from receipt of order. Standard shipping is 2-Day Delivery via the Post Office. However, we also provide Next Day shipping from the Post Office or guaranteed service from UPS. (Some destinations have limited shipping service options.)
  • Does the ActivFIT CJ Sail have a warranty?
    Yes, it’s 90 days from receipt for manufacturer’s defects.
  • Can I use an ActivFIT CJ Sail for any other applications?
    Yes, we have installed CJ Sails on KAFOs and PFFDs.
  • What do you use to make your ActivFIT CJ test sockets?
    The ActivFIT CJ test sockets are made from PETG or ThermoLyn stiff.
  • Do you offer central fabrication for the ActivFIT CJ rigid socket section?
    We do not currently offer central fabrication as a standard service at the CJ Socket factory. However, we have certified 3 central fabricators to produce our ActivFIT CJ Socket. Please visit the Professionals section on the website to download their order forms. If you have a particular manufacturing question or issue, please call (978.922.0413) or email us.
  • The roll at the top of the ActivFIT CJ Sail becomes uncomfortable in sitting. What can be done?
    If the roll at the top of the ActivFIT CJ Sail becomes uncomfortable, you can partially or fully remove the felt roll. Please call (978) 922-0413 for instructions.
  • My patient is complaining of groin pain.
    The ischium should not contact the rigid socket. Make sure your medial wall does to extend posterior to the adductor longus. Check for proper rotation on donning. Make sure the medial wall angles out (medially/ towards the midline) to transition to the Sail’s splay. Your socket may be too deep. Your ML may be too wide.
  • The ActivFIT CJ Sail seems too low below the gluteal fold.
    If the limb is very conical, or the socket requires significant flexion, the ActivFIT CJ Sail can be made with an arc shape to raise up the proximal edge.
  • The patient cannot snug the ActivFIT CJ Sail effectively.
    In cases of poor arm strength, the sail can be made with chaff loops on the batten. This will provide a 2:1 pull and reduce the required strength by 50%. In cases of poor finger strength, sewing large Dacron loops on the closure straps can be helpful.
  • The ActivFIT CJ Socket feels heavy or causes pins and needles (paresthesia)
    The closure may be pulled too tightly. Make sure it is soft in non-weight bearing. In cases of extreme ischemia, the ActivFIT CJ Sail can be left loose while sitting and snugged only when needed to ambulate.
  • The batten on the ActivFIT CJ Sail is pulled over and onto the rigid socket adductor longus area.
    Your socket is out of volume adjustment. Ideally the batten should be between .5 to 1.25 inches posterior to the rigid socket trim line. The Sail should cover half the residual limb and follow a normal shape. Socks and pads may be used to decrease socket volume. Consider a new socket.
  • The 1:1 Velcro closure on the ActivFIT CJ Sail wears out too fast.
    The 1:1 Velcro is under too much tension. Consider a 2:1 Loop attached to batten closure. Consider a 1" pressure buckle + 1" Loop closure and eliminate the Velcro.
  • The ActivFIT CJ Socket rotates externally at heel strike.
    The Scarpa’s modification may be too aggressive. Check for excessive toe out. Use a proximal suspension aid i.e., Coyote, Kiss or a small Velcro strip attached to the gel insert. There are times when with any socket, soft, fleshy or short limbs just need a belt.
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