What Breast Implants feel the most natural?

Thank you for the question.  Generally speaking,  the type of implant used may  determine the final outcome for some patients undergoing breast augmentation, especially if the patient does not have significant covering breast or adipose tissue. Most surgeons feel that silicone implants have a more natural look and feel than saline implants because silicone gel has a texture that is similar to breast tissue.
 In other words, if a patient has enough breast tissue to cover the implant, the final result will be similar when comparing saline implants versus silicone gel implants.  If a patient has very low body fat and/or very little breast tissue, the silicone gel implants may provide a more "natural" result.
Generally speaking, if I can see/feel a patient's rib cage clearly, I am very concerned about the potential for breast implant rippling/palpability, and will likely recommend the use of silicone gel breast implants.  Also, generally speaking, the best online advice I can give to ladies who are considering  breast augmentation surgery ( regarding breast implant type/size/profile selection) is:
1. Concentrate on choosing your plastic surgeon carefully.  Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you are looking for. Ask to see lots of examples of his/her work.  2.  Again, have a full discussion and communication regarding your desired goals with your plastic surgeon. This communication will be critical in determining which operation and/or breast implant size/type/profile will most likely help achieve your goals.
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as “natural” or "C or D cup" etc means different things to different people and therefore prove unhelpful.
 Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup  size may also be inaccurate.   Therefore, I ask that my patients not base their communication preoperatively OR  their satisfaction with the outcome of surgery postoperatively, on achieving a specific cup size. The use of computer imaging may be very helpful during this communication phase.
3.  Once you feel you have communicated your goals clearly,  allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals.  Again, in my practice, this decision is usually made during surgery.  The use of temporary intraoperative sizers, viewing the patient's breasts in the upright and supine position, are very helpful during the breast implant selection process.
I hope this, and the attached link (dedicated to breast augmentation surgery concerns), helps.  Best wishes.

The two different types of implants are silicone and saline.  Saline implants have a lower incidence of hardening and ruptures are immediately detectable.  Saline implants may also have a less natural feel in patients with little to no breast tissue.  Silicone implants have a higher incidence of hardening and ruptures are more difficult to detect which requires monitoring. However, silicone implants feel and look very natural.  Both saline and silicone implants have a silicone outer shell, are safe and are FDA approved for breast augmentation.  Both types also have about a 10-15 year replacement cycle.  You need to consult with a board certified plastic surgeon to discuss which implant is best for you.

Gel implants have a better tactile outcome.  Some of the new implants with higher gel viscosity may be of benefit in some patients but that's not been decided yet.